intelligence suggests the assad regime may be planning sarin gas attacks against rebel forces. the lethal nerve agent is 500 times deadlier than cyanide. the syrian foreign ministry denies the reports. >>> a highway tunnel that collapsed and killed nine people in japan over the weekend reportedly passed safety checks just a few months ago. several cars were crushed when a section of concrete longer than a football field came crashing down sunday in the tunnel west of tokyo. inspectors believe loose bolts may be to blame. japan has now ordered emergency inspections of highway tunnels across the country. >>> two mexican nationals have been charge with killing a u.s. coast guards man. they have been were suspected of smuggling drugs off the california coast yesterday. they rammed the coast guard boat killing 34-year-old chief petty officer terrell horne who leaves behind a child and a pregnant wife. >> he allowed me to have someone to look up to. he was a man of honor. i was proud to call him chief. >> another u.s. coast guardsman suffered minor injuries in the crash. >>> the most